Is it possible to compile from D to C++?

Explanation:
I do some competition programming and would like to write it in D instead of C++ :)

On Tuesday, 30 August 2016 at 13:33:44 UTC, Nick wrote:
> Is it possible to compile from D to C++?
>
> Explanation:
> I do some competition programming and would like to write it in D instead of C++ :)

maybe will help https://wiki.dlang.org/Calypso

On Tuesday, 30 August 2016 at 14:24:22 UTC, eugene wrote:
> On Tuesday, 30 August 2016 at 13:33:44 UTC, Nick wrote:
>> Is it possible to compile from D to C++?
>>
>> Explanation:
>> I do some competition programming and would like to write it in D instead of C++ :)
>
> maybe will help https://wiki.dlang.org/Calypso

That's quite nice, but not what I'm looking for.
What Calypso does, as far as I can see, is to make it possible to compile C++ and D together. I'm looking for a compiler that takes in D code and spits out either C or C++ code.

On Wednesday, 31 August 2016 at 11:43:12 UTC, Nick wrote:
> On Tuesday, 30 August 2016 at 14:24:22 UTC, eugene wrote:
>> On Tuesday, 30 August 2016 at 13:33:44 UTC, Nick wrote:
>>> Is it possible to compile from D to C++?
>>>
>>> Explanation:
>>> I do some competition programming and would like to write it in D instead of C++ :)
>>
>> maybe will help https://wiki.dlang.org/Calypso
>
> That's quite nice, but not what I'm looking for.
> What Calypso does, as far as I can see, is to make it possible to compile C++ and D together. I'm looking for a compiler that takes in D code and spits out either C or C++ code.

I can't imagine that's been done, and I'm not sure it will be high on anybody's list of priorities I'm afraid. A lot of work was done on automating C++ -> D, but converting D, a language intended to replace C++, to C++ itself seems a little backwards. I get why you'd like to use it, but I don't think it's been done, sorry.

On Wednesday, 31 August 2016 at 11:43:12 UTC, Nick wrote:
> That's quite nice, but not what I'm looking for.
> What Calypso does, as far as I can see, is to make it possible to compile C++ and D together. I'm looking for a compiler that takes in D code and spits out either C or C++ code.

Your best option would be to use LDC with a C backend:
https://www.google.com/search?q=llvm++c+backend
No idea how well supported this is, I've never used LLVM myself.

On Wednesday, 31 August 2016 at 12:13:38 UTC, Michael wrote:
> I can't imagine that's been done, and I'm not sure it will be high on anybody's list of priorities I'm afraid. A lot of work was done on automating C++ -> D, but converting D, a language intended to replace C++, to C++ itself seems a little backwards. I get why you'd like to use it, but I don't think it's been done, sorry.

Given that you can call D from C++, I don't see the need for such a tool.

On Wednesday, 31 August 2016 at 12:19:33 UTC, Cauterite wrote:
> On Wednesday, 31 August 2016 at 11:43:12 UTC, Nick wrote:
>> That's quite nice, but not what I'm looking for.
>> What Calypso does, as far as I can see, is to make it possible to compile C++ and D together. I'm looking for a compiler that takes in D code and spits out either C or C++ code.
>
> Your best option would be to use LDC with a C backend:
> https://www.google.com/search?q=llvm++c+backend
> No idea how well supported this is, I've never used LLVM myself.

Julia guys resurrected the C back end for LLVM.  Chap here posted about using this to compile D to bitcode to C to JS (last but using emscripten).  Even without last stage,  doesn't sound a great idea if you are under time pressure,  as the whole process is quite fragile.

It would be nice to have a robust C backend, even bearing in mind all problems with UB and difficulties one can imagine that might cause.